Bobbin stripper



G. J. PFEIFFER BOBBIN STRIPPER Filed Fab. 14. 1922 9 Sheets-Sheet 5 9Sheets-Sheet '7 L-llww" R9 G. J. PFEIFFER JBOBBIN STRIPPER Filed Feb.14, 1922 Il s es .gb l

N T o N C) g O 2 3 5 c In msn t@ r i4. ww,

BoBBIN STRIPPER Filed Feb.` 14. 1922 9 Sheets-Sheet 8 G. J. PFQEIFFERBOBBIN STRIPPE'R @@ned Fp. 14. 1922 9 sheets-sham 9 fw v '0 oo www l l ll L OO im mmm i o@ (Fig. 1) rotatable in fixed bearings on the frame andhaving a spur gear 36 and a dwell gear or star wheel 37 (Fig. 8) securedto its outer end. The stripping plate 32 is mounted on a similar shaft38, the outer end `of which is supported in a swivel bean ing 39 (Fig.9) which permits the shaft 38 to swing horizontally about the bearingpivots 40 so that the plate 32 may approach or recede from the plate 33.

A gear 41 on the yshaft 88 meshes with the gear 36 on the shaft 35. andis of equal size. A single tooth locking pinion 42 is mounted ou a shaft13 supported in bearings on the frame 3() (Fig. 1) and extending to theopposite or right hand end of the machine where it is connected byspiral gears 44 (Fig. 6) and 45 (Fig. 1) to a crank shaft 46 rotatablein bearings 47 on the end of the frame 30.

The shaft 46 is connected by a gear 48 and pinion 49 to a shaft 50 onwhich a drive pulley 51 (Fig. 6) is loosely mounted. The pinion 49 vandpulley 51 are provided with co-operating clutch teeth and the pulley isaxially movable to engage or disengage these teeth by means of a yokelever 52 mounted on a cross shaft- 53 (Fig. 2) ysupported in a bearingframe (Fig. 1)

bolted to the frame 30.

An arm 55 (Fig. on the shaft 53 extends beneath the frame 30 in positionfor engagement by a vlatch 56 (Fig. 11) pivoted at 57 on the frame 30. Aspring 58 (Figs. 2 and 3) yieldingly moves the arm 55 upward and tendsto disengage the driving pulley 51 from the pinion 49. A second spring5.9 yieldingly moves the latchV 56 to engage the arm when said arm 55 isdepressed. A shipper rod 60 extends lengthwise of the machine, asshownin Fig. 2, and is provided at its right hand end 'with an arm 61(Fig. 3) and a roll 62 vpositioned to engage the arm 55 on the crossshaft 53. At its left hand end the shipper rod 60 is vprovided with ahandle 63 (Figs. 1 and 8) extending across the end of the machine andheld yieldingly in raised vposition by a spring 64 (Fig. S) which causesthe handle to engage a bolt 65 in the end of the frame 30 which acts asa stop for the handle.

To start the machine, it is merely necessary to depress the handle 63,swinging downward the arm 55 Vuntil engaged by the latch 56 which holdsthe parts in driving position. I Y

rl`he crank shaft 46 is provided with a crank pin 66 (Fig. 1) on a disc67. One end of a connecting rod 68 is pivoted on the pin 66 and theopposite end is connected by an adjustable head 69 to an arm 70 (Fig.10) fixed dto a cross shaft 71 supported in hearings in thev frame 30. Asecond arm 72 is secured to the cross shaft between its bearingsand isconnected by a link 73 (Fig.

7) to the head of the bobbin engaging plunger 34 which is slidable in afixed bearing 74 in the frame 30.

Yielding lateral tension is applied to the movable shaft 38 and stripperplate 32 by devices best shown in Figs. 11 to 14. These devices comprisea rod 75 pivoted in bearings on the frame 30 and having an arm 76extending downward therefrom. A rod 77 is connected at 78 to the arm 76and its opposite end is loosely slidable in a bracket 79 secured to theunder side of the frame 30.

A heavy coil spring 8O surrounds the rod 77 and the tension thereof maybe adjusted by lock nuts 81. A second pair of lock nuts 82 may beadjusted to limit outward movement of the rod 77 under the action of.the spring SO.

A second arm 83 (Fig. 13) is fixed to the rod 75 and extends upwardadjacent the shaft 239. A contact plate 84 is pivoted at 85 on the armS3 and is pressed yieldingly against the shaft 3S by a coil spring SGseated in a recess in the upper end of the arm S33 and provided with ascrew 87 for adjusting the tension thereof.

As the stripper plate 32 is pushed away from the plate by the entranceof a bobbin to be stripped, the shaft 3S at first yields easily ag;ainst the light tension of the spring 86. When the plates 32 and 33have been separated sufficiently to admit the butt of the bobbin betweenthem, the contact plate 84 positively engages the arm S3 and furtherseparation of the stripper plates may be obtained only by compressingthe heavy spring SO. The plates 32 and 33 are thus held firmly instripping relation and yield from this position only when it isnecessary to prevent breakagevln addition to the stripper handle 63. lhave provided another handle l1 and 12) by which the machine may bestopped. This handle is secured to a cross shaft 91 mounted in fi ,dbearings above the frame 30 and havingan arm 92 connected by a link 93with a short arm 9iformiug a part of the latch 56. By moving the handle90, the latch may be withdrawn and the clutch released. This handle isonly useful for stopping the machine and does not take the place of thestripper handle (Si) in starting the saine.

The plunger 34 engages the tip of a bol bin held between the strippingjav. 32 and 33 and forces it outward or to the right in Fig. 1 until itreaches the position indicated in Figs. 19 and 20. The bobbin is theneugaged by a bobbin pulling device to be described. which completes themovement of the bobbin from between the stripping jaws.

Referring to Figs. 4 and 5, this pulling device comprises a slidingblock 95 mounted in guide-ways 96 and 97 on the frame 3() and connectedby an adjustable. link 98 to lll) a crank 99 on the crank shaft 46. Aplate 100 is bolted to the top of the block 95 and projects aconsiderable distance beyond the end o1' the block as shown in Fig. 5.

A forked member 101 is pivoted at 102 to the end of the plate 100 andisv held in the position shown in Fig. 5 by a tension spring 103 whichconnects an ear 104 on the member101 to a pin 105 in the plate 100. Asto-p 106 limits the movement of the 4member 101 by the spring 103.

A block 107 is mounted on a lever 103 ('Fig. 4) pivoted at 109v on theguide-way 97 and normally held against the stop plate 110 by a spring111. The block 107 has a cam face 112 for a purpose to be described.

As the bobbin is partially ejected from between the rstripper plates 32and 33, the head of the bobbin rests upon plates 113 and 114 (Figs. 4and 22) pivotally supported on hinge plates 115 and yieldingly held inthe yposition shown in full lines in Fig. 22 bv springs 116 connected toVarms 117 projecting outwardly from the plates 113 and 114 and actingalso as stops to determine the normal position of the plates.

As the bobbin pulling device is moved to the left from the positionshown in Fig. 4 to that shown in Fig. 20, .the forked member 101 engagesthe block 107 and swung upward ,as indicated in Fig. 19 to pass over thehead of the bobbin B to be engaged. After the member 101 passes beyondthe block 107, it snaps rdownward into the position shown in Fig. 20. Asit thereafter returns to the f position shown in Fig. 4, it engages thehead or butt o1 the partially stripped bobbin and pulls it from betweenthe stripjliing plates 32 and 33. On this return movement, it engagesthe .cam surface 112 `of the block 107 and pushes the block easily ontet its path.

As this return movement of the block and the bobbin engaging member1011s positive, l have provided thespring plates 113 and 114 .so that amisplaced bobbin, it engaged by the member 101, may be forced downwardbetween the spring .plate as indicated in Fig. 22. without injury lo theapparatus.

The hopper and feeding mech anisin ol' the machine will now bedescribed. An inclined table or hopper 120 (Figs. 1 and 12) is mounted.above the stripping mechanism and is so arranged that the bobbins willmove by gravity towardy the rear or idelivery end of the hopper, thebutts of the bobbins being` disposed at the right of the hopper asviewed in Figs. 1' and 11.. A guide plate 121 (Fig. lr6) is `secined tothe right hand end wall of the hopper to direct the butts of the bobbinsas they approach the stripping plates 32 and A similar guide 122 (Fig.1o) on'the le'lt hand end wall .of the hopper directs the lips ol thebobbns into :a recessed ineinber 123 which liesk in the (Fig. 7).

A linger 124 (Fig. 15) is pivoted at 125 on the end of the hopper andextends into the guide-way or passage through which the bobbins tipsenter the recessed member 123. A spring 126 (Figs. 7 and 11) normallyholds the finger 124 in the position shown in Fig. 15. Mechanism to bedescribed is provided for periodically withdrawing the finger 124 topermit the passage of a bobbiu ti o.

1A second holding arm 127 (Fig. 15) is pivoted at 128 on the end of thehopper and is yieldingly held in the path of the plunger by a coil sring 129 (Fig. 7). The position of tlie'hol ing arm 127 may be adjustedby path oli' the plunger 31 means of a screw 130 (Fig. 7) engaging thelfixed wall of the hopper.

A leed. plate 131 15 and 17) is n'iounted to slide on a bracket orcasting 132 supported by the trame 30. The plate 131 is formedsubstantially in the shape of a hollow rectangle and is guided formovement `transversely 01"' the bracket 132 by bars 1.33 Aoverlying theplate and bolted to the bracket.

An auxiliary arm 134 is provided for engaging' the tips of the bobbins,this .inember being adjustably secu-red to extensions 13.5 and 130 (Fig.17) of the plate 131. The position of the member .1.34 may be varied tocorrespond to the length of the bobbins which are being handled.

A rectangular block 137 .is mounted `to slide in the opening 133 ot theplate 131 and yielding-ly held in the positionV shown in Fig. 17 by twosprings 139 extending through openings 1.40 (Fig. 13) in the block 137land secured 'to the block at its opposite face in .any convenientmanner as by cross pins 141.

A cam roll 142 (Fig. 13) kis pivotally mounted beneath the block 137 andextends into :i cam slot 143 in a slide 144 mounted in guide `ways inthe bracket 132 (Fig. 15). The slide 144 is connected by a link 145(Fig. 1) to a `cross rod 140 (Fig. 10) secured in the upper ends ot theswinging arms 7.0 .ai nd 72. The can.: slot 1.43 is so disposed thatmovement ol the slide to the lett, as the plunger is withdrawn, willadrance the block 137 and plate 131 to engage the lowcrn'iost bobbin inthe hopper and force it past the yielding arm 127 into the recessedmember 123.

A rod 147 (Fig. 17) is loosely connected at 143 to the crtilinsion 1.35ol the plate 131. rihe other end ot' the rod 147 (Fig. 15) is connected`to the upper end ot thc linger 124 in such a way that the downwardfeeding movement of the plate 131 also `withdraws `the linger 124 'topermit advance niovement oil: 'the next bobbin.

A lever 150 (Fig. 17) is pivoted at 151 153 and causing it to engage theplate 154 and turn the shaft 91 to release the latch no and stop themachine, as previously described.

A. plate (Figs. 11 and 1(5) is pivoted to the hopper at 15G and extendsdownward and inward to form a yielding wall portion adjacent the pointwhere the bobbins are delivered to the stripping plates 32 and 33. Astop screwv 15T determines the position of 'the plate155 and arelatively strong spring 158 yieldingly maintains the plate in operativeposition. An arm 15S) (Figs. 11

and 12) on the shaft 91 is engaged by the plate '15o whenever it ismoved l'from operative position and thereby stops the machine. A latch160 (Fig. lo) is pivoted at 161 on a plate 162 on the hopper andcorresponds in function to the arm 1,27 previously described. rlhenormal position ot the latch is determined by an adjusting screw 162engaging the end wall of the hopper and a spring 163` (Fig. 11) permitsyielding movement et' the latch as the bobbins are torced downward bythe plate 181. .f 'i`he method of operation et my improved machine hasbeen pointed ont in connection with the description otl the detailedparts 'and an extended explanation ot the operation is consideredunnecessary. The bobbins are placed in the hopper 120 and the parts areso timed'that the plate 131 pushes a bobbin downward at the same timethat the onetoothed pinion 42 advances the star wheel 3T and turns thestripping discs 32 and 33 Afrom one operative position to the next.

The plunger S4 then advances, pushing the bobbin axially between thestripping plates to the position indicated in Fig. 20. The pullingdevice 101 then advanced to engage the butt ot'thc bobbin and completelywithdraw the bobbin from between the stripping jaws. i

As rthe head ot the bobbin passes the spring plates 11S and 11i.. thebobbin is permitted to 'tall into a suitable receptacle (not lshown)whih` the waste yarn which is held hach by the stepping plates 32 and 33falls into a diii'erent receptacle, being guided thereto by a plate 164(Fig. 2).

1N ith this arrangenicnt et combined pushing and pulling members, thewaste yarn is very eliectively removed from the bolobins.

Having thus described my invention it will be evident that changes andmodifications can he made therein by those skilled in the art within thespirit and scope oi my invention as set forth in the claims and I do notwish to be otherwise limited to the details herein disclosed but what lclaim is:-

1. A. bobbin stripping machine having. in combination, bobbinstriiiiping devices, means to partially remove said bobbinlongitudinally from between said devices, additional means to positivelycomplete such movement, and means to yieldingly support the bobbinduring the latter operation and to permit discharge of a misplacedbobbin.

2. A bobbin stripping machine having, in combination, bobbin stripping`devices, means to partially remove a bobbin from between said devices,a. forked pulling member yieldable in one direction. means to move saidmember vtoward said bobbin and to yieldingly displace said member byengagement with the bobbin head and means to withdraw said ilforkedmember in positive engagement with the head of the bobbin, therebycompleting the removal olf the bobbin from the stripping device.

A bobbin stripping machine having, in combination, bobbin strippingdevices, means to move a bobbin longitudinally between said devices, andmeans positioned for engagement and movement by a misplaced bobbin whenthus moved longitudinally and effective to stop the machine when thusmoved.

4. In a bobbin stripping machine, bobbin stripping devices, a hopper, a'feed plate, means to periodically slide said feed plate to advance abobbin from said hopper to said stripping devices, and means to-stop themachine when free sliding movement of said plate is prevented.

5. In a bobbin stripping machine, bobbin stripping devices, a hopper, afeed plate, said plate comprising two parts normally movable together tofeed a bobbin, and means to stop the machine, said means being yradeetiectivo by relative movement between the two parts oi said plate.

6. In a bobbin stripping machine, bobbin stripping devices, a hopper, aholding finger normally in operative position, and means to periodicallywithdraw said linger to permit a bobbin to advance to delivery positionin said hopper and to simultaneously feed a previously advanced bobbinfrom the hopper to stripping position.

7. In a. bobbin stripping machine, bobbin stripping devices, a hopper, abobbin holding nger normally in operative position, a bobbin feedingdevice, and connections between said feeding device and said fingereti'ective to withdraw said iinger to permit a bobbin to advance todelivery position in 1,515,eso

said hopper and simultaneously with the operation of said feeding deviceto positively move a previously advanced bobbin to stripping position.

8. In a bobbin stripping machine, bobbin stripping devices, a feed platehaving a cam roll thereon, a slide having a cam slot for said roll, andmeans to move said slide periodically to actuate said feed plate.

9. In a bobbin stripping machine, bobbin stripping devices, a feed platehaving a cam roll thereon, a slide having a cam slot for said roll, andmeans to move said slide periodically to actuate said feed plate, saidcam roll being mounted for yielding movement relative to said bobbinengaging portion of said feed plate if movement of the latter isobstructed.

l0. In a ybobbin stripping machine, a pair of rotatable strippingplates, means to oppose light spring tension against initial separationof said plates, Eand means to oppose heavy spring tension to furtherseparation thereof.

1l. In a bobbin stripping machine, a pair of rotatable stripping plates,means to oppose light spring tension against initial separation of saidplates, and means to oppose heavy spring` tension to further separationthereof, said first means including an arm comprising two parts spaced adefinite limited distance apart by a relatively light spring, said partspositively engaging each other after such limited relative movementthereof.

l2. In a bobbin stripping machine, a frame, a pair of rotatablestripping discs` shafts for said discs, and a sivivel bearing for one ofsaid shafts, said bearing being` vertically adjustable in said frame.

13. In a bobbin stripping' machine, in combination, boibbin strippingdevices, a hopper, a pail1 of yieldingly mounted lingers each normallyin operative position, a feeding1 device, mechanical means to positivelyWithdraw one only of said fingers as said feeding device is operated,the other finger being` yieldingly displaced by the lovvermost bobbin insaid hopper as said bobbin is discharged from the hopper, and means topositively force said lowvermost bobbin from the hopper to strippingposition.

In testimony whereof I have hereunto aflixed my signature.

GEORGE J. PFEIFFER.

